getting vehicle started info

Printed From: the12volt.com
Forum Name: Vehicle Wiring Information & File Requests
Forum Discription: Request Car Alarm, Car Stereo, Cruise Control, Remote Starter, Navigation, Mobile Video, and Other Vehicle Specific Wiring Info, Manuals, Tech Tips
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=119731
Printed Date: May 01, 2025 at 6:29 PM

Topic: getting vehicle started info

Posted By: chuckycharms
Subject: getting vehicle started info
Date Posted: January 29, 2010 at 10:19 AM

Hey all,

I have a scytec galaxy 2000 installed in my 05 Nissan Titan. Im just tinkering around with putting a linux box on the truck to do some 'random' things. I have a sensor on my linux box that waits for a voltage spike to signal a program to initiate.

What I would like to know is what is the best way to know when a car has been started, and be able to feed that into this sensor. Any thoughts would be awesome!

Replies:

Posted By: oldspark
Date Posted: January 31, 2010 at 2:54 AM

Charge lamp circuit. Goes to +12V when charging.

Posted By: chuckycharms
Date Posted: February 16, 2010 at 12:03 PM

Hey Thanks!!

Would you have any suggestions as to a way to find this on most vehicles?

Posted By: oldspark
Date Posted: February 16, 2010 at 3:40 PM

The D+ or L wire from the voltage regulator - ie, alternator.

It should go to the ground of the dash's charge bulb - maybe via a diode, and maybe via other diodes to other dash lamps (eg - brake fault) (all diodes being in the dash) - or it could power a relay etc.
Hence stick with the alternator end...

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